ORS 821.191: Operation of Class I, Class II or Class IV all-terrain vehicle on highway; unlawful operation of Class I, Class II or Class IV all-terrain vehicle used for agricultural purposes; penalty.

(1) Notwithstanding any other provision of law, a person may operate a Class I, Class II or Class IV all-terrain vehicle that is not otherwise properly equipped for operation on a highway on the highways of this state if:

      (a) The person is using the all-terrain vehicle for transportation between ranching or farming headquarters, agricultural fields or pastures;

      (b) The person holds a valid driver license;

      (c) The person complies with posted speed limits, but in no event exceeds a speed of 20 miles per hour;

      (d) The person operates the all-terrain vehicle as closely as is practicable to the right-hand edge of the highway, including shoulders, if any;

      (e) The all-terrain vehicle is equipped with a lighted headlight and taillight; and

      (f) The all-terrain vehicle displays a slow-moving vehicle emblem described under ORS 815.060.

      (2) A person commits the offense of unlawful operation of a Class I, Class II or Class IV all-terrain vehicle used for agricultural purposes if the person operates a Class I, Class II or Class IV all-terrain vehicle on a highway in violation of subsection (1) of this section.

      (3) The offense described in subsection (2) of this section, unlawful operation of a Class I, Class II or Class IV all-terrain vehicle used for agricultural purposes, is a Class D traffic violation.